Folio



May 2, 193.3- F. E. BURGSTYALILER 1,906,311

FOLIO Filed Nov. ll, 1931 Patented May 2, 1933 PATENT oFFICE FRANZ n. nunesrnmnnon isos'roiv,y MASSACHUSETTS lrome Application filed November 11, 1931. Serial No. 574,258.'

This invention relates to folios for supporting separate sheets or groups of sheets in book form in such a manner that printed, pictorial or other matter carried by the sheets may be exposed to`view asdesired and without the necessity of perforating the sheets or otherwise modifying them in any way. To this end the folio comprises `pages mounted in book form, these pages each formed as an envelope to containthe sheet or sheets andV provided with at least one face formed of a pelliclev of regenerated cellulose, a trade name for which is Cellophane. This material has several attri- 1'5 butes particularly suiting l*it for the purpose, these attributes not being present, at least in the same degree, in other transparent sheet material. lThis regenerated .Y cellulose pellicle is highly transparent, is -of light weight, is not liable to become scratched by kdust particles, is of low inliammability, is sufliciently flexible forthe purpose and yet issufliciently yspringy so that adjacent leaves may be separated easily as when it is desired to turn the pages of the folio, and ..1

it has a certain adhesive quality which .tends 'to retain inserted sheets in'V position so that Vthey are vnot lia-ble to accidental removal or displacement. Itidoes not, however, im- 39 pose undue resistance to the removal or rearrangement of the sheets when' this is desired. In order to facilitate the insertion of sheet material Within the envelopes it is preferable to associate therewith a relatively stiff card which may be permanently e secured therein, but preferably terminating .short of the free edges of the envelope leaves so that they present margins of the'trans- `parent regenerated cellulose pellicle to the 40 fingers thus to facilitate turning of the leaves.y Where the card is permanently secured it divides the envelope'into two oppositely facing compartments each of which Ymay receive sheet-material, and the card may be of suitable color to form a desirable background when the sheet material comprises photographs or other pictures.. vBy providing the Vcard with a somewhat i'ough ened surface it cooperates'with the outer 59 wallsof vthe transparent regenerated vcellu- ,of the folio.

lose pellicle to prevent accidental slippage of the sheet material within the envelope. This envelope material also is well adapted to being bound into boolr form, requiring noseparate hinge parts at the centerof the folio.' Of 'itself it is substantially waterproof and where the folio is provided with a waterproof cover it is well suitedV to receive sheets of band music, the sheets being fully protected when the folio is being used in rainy weather.

For a more complete understanding of this invention, reference maybe had to lthe accompanying drawing in which y vFigure l is a perspective` of the folio in open position.

Figure 2 is a Vperspective to a smaller scale of a portion of a double leaf of the folio.V

vFigure 3 is a perspective showing theentire leaf.

Figure 4 is urel.

Figure 5 is a view similar toV Figure 4, but showing a modification. n'

Figure 6 is a perspective showing the folio closed. f f

Figure 7 is a perspective showingthe folio opened andfolded back and carried by a lyre so as to be xed to a band instrument.

Referring to the drawing, the folio comprises a plurality of leaves l and is preferably provided with'a. cover 2 which is preferably of a suitable waterproof material. The leaves l are preferably formed double as shown in Figure 3, as the material is sufliciently flexible to require noy separate hingeportion to permit opening and closing As 'shown in Figure 3 each one is formed of a thin sheet or pellicle of regenerated cellulose asl at 3, which is folded on itself as at 4, each ofthe edges being brought together and securedto eachother as at 5, thus to form a flat tube open atV its ends as shown in Figure 2, and a piece of cardboard l2 nearly as wide as thev a section on line 4 4 of Fig- .envelope and sufficiently short to terminate somewhat inwardly of theopen'ends is inserted into the tube. A plurality of these double leaves may be arranged in superposed relation, as is shown in Figure l,`

and on the cover 2, and they may then be secured together midway of their lengths by any suitable means such as the line of stitching 8 shown in Figures l and 6, or the metallic sta-ples shown at 9 in Figure 5. The cover, at least at the portion where the securing means passes, is preferably suliiciently flexible lto permit the folio to-be opened and turned back on itself, as shown in Figure 7, so as to present any selected page exposed, and in condition to be grasped by a lyre l0, as shown in Figure 7, so that the folio can be supported as from a band instrument. The several leaves thus form transparent envelopes open at their edges remote from the hinge binding of the folio, and in which may be placed any desired printed matter or pictures or the like, in such a manner that the matter carried on the face of the sheet material may be visible through the regenerated cellulose pellicle which covers `its face.

'This regenerated cellulose pellicle .is somewhat crinkly 'which seems to aid in preventing accidental slippage of the sheetmaterial within the envelope. It also has a certain adhesive quality which further acts to retain the sheet material in position, although it is not of a sticky nature. such as to interfere materially with the 'removal or replacement of the sheets within the envelope pages.

The cardboard sheet l2 .extends across the central portion of the double sheet where the stitch lline or other fastening indicated by the dotted line 13 passes and by which the leaves are bound into book form. By terminating' the cardboard somewhat inwardly of the open ends of the leaves the leaves present the cellulose pellicle at their edges for engagement by the fingers of the user in turning the pages of the folio. These edges are thus somewhat flexible and are found admirably adapted for engagement by the fingers in turning the leaves ofthe folio, it being much easier to turnY the leaves with this construction than if the cardboard is extended to or beyond the open ends of the envelopes.

rlhe cardboard may be of material sufficiently thin and flexible, particularly at its central portion7 to permit turning back of the book with its covers together in the position shown in Figure 7 without breaking. rllhis inserted cardboard sheet preferably is provided with a somewhat roughened surface which cooperates with the regenerated cellulose pellicle to prevent slippage of the sheet material' placedin the envelope and it may be of various colors suitable for use as a background when photographs or other pictures are placed 1n the envelope pages.

rllhe folio thus made up is relatively light in weight and due to the relative non-inflammability of the regenerated cellulose the sheet material is protected somewhat from danger of lire damage as well as from deterioration from moisture. Due to its light weight it makes possible the carrying of a considerable number of sheets of band music in a package so light in weight that it may veasily be supported from a band instrument without inconvenience or annoyance to the player.

From the foregoing description of an embodiment of this invention it should be evident to those skilled in the art that various changes and modifications might be made w-ithout departing from the spirit or scope of this invention as defined by the appended claims.

I claim:

1.- A folio comprising a ,pluralityv of flat tubes of regenerated cellulose pellicle material .having open ends, a cardboard sheet l within said tube'and terminating inwardly of vsaid ends, and means between said ends for binding said tubes and sheets together in book formation.

2. Afolio comprising a plurality of pellicles Vof regenerated cellulose, 'each being folded substantially :centrally and having its edges `secured vtogether to form a fiat tube open at its ends, a card in each of said tubes of a width slightly less than the Y width of its tube and having its ends terminating inwardly of the open ends thereof, and means for securing said tubes and cards together in book. formation midway between said open ends.

3. `A folio comprising a plurality of pelliclesl of regenerated cellulose, each being folded substantially centrally and having its edges secured together to form a fiat tube openlat its ends, a card in each of said tubes of a widthslightly less than the width of its tube and having its ends terminating inwardly of the open ends thereof, said cardshaving rough surfaces, and means for securing said tubes and cards together 'in book formation midway between said open ends.

4. A leaf element for a folio which comprises a flat tube of regenerated cellulose pellicle having an open end, and a card forming a part of said element within said tube and terminating inwardly of said end.

5. A leaf element for a folio which comprises a fiat tube of regenerated cellulose pellicle having open ends, and a card forming a part of said element within said tube and having its ends terminating of said tube ends.

v 6. A leaf element for a folio, which comprises a lflat tube of regenerated cellulose inwardly Vpellicle having an open end, and a card forming a part of said element within said tube and extending toward said end.

7. A folio comprising a plurality of fiat tubes lof regenerated Icellulose pellicle each having an open end, a cardboard sheet Within each tube and terminating inwardly of said end, and means for binding said tubes and sheets together in book formation inwardly of said ends.

In testimony whereof I have aflxed my signature.

FRANZ E. BURGSTALLER. 

